most
oil filter we use on our street motor by pass at 11 - 14 PSI. I found the Motorcraft FL1A HP by pass is 25 PSI. Last year I could find them in parts stores, Ford dealers for $10 to $15 each. Then they became hard to find. I did a search and found them for $9 plus shipping so I ordered a case. This is Summit info on the FL1A filter, note the Relief Valve Open pressure. Does this mean anything above 14 PSI the
oil is by passing the filter?
Dwight
Brand Motorcraft
Manufacturer's Part Number FL1A
Part Type
Oil Filters
Product Line Motorcraft Oil Filters
Summit Racing Part Number ACF-FL1A
Oil Filter Style Canister
Height (in) 5.190 in.
Outside Diameter (in) 3.780 in.
Filter Bypass Relief Valve Yes
Relief Valve Open (psi) 11-14 psi
Anti-Drainback Valve Yes
Smallest Particle Filtered 20 microns
Maximum Burst Pressure (psi) 200 psi
Thread Size 3/4-16 in.
Gasket Outside Diameter (in) 2.800 in.
Gasket Inside Diameter (in) 2.422 in.
Gasket Thickness (in) 0.203 in.
Quantity Sold individually.